[size="2"]Hi[/size]
For speed I am mainly copying code here.
I have a similar case where I have Users that can be Supervisor of another User. The ‘ParentChild’ table defines the relations between users. One of the relations is supervising which is defined in a scope called ‘supervises’ on the ParentChild.
Here is an extract of the relations:
/* Supervision */
'supervisor' => array(
self::HAS_ONE,'User',array('parent_id'=>'entity_id'), // Supervisor is the parent
'through'=>'supervised_relation','joinType'=>'INNER JOIN'),
'supervisors' => array(
self::HAS_MANY,'User',array('parent_id'=>'entity_id'), // Supervisor is the parent
'through'=>'supervised_relation','joinType'=>'INNER JOIN'),
'supervised_relation' => array(self::HAS_MANY, 'ParentChild', array('child_id'=>'entity_id'),
'alias'=>'sdr'.$alias,'scopes'=>'supervises','joinType'=>'INNER JOIN'),
'supervisedUsers'=>array(self::HAS_MANY,'User',array('child_id'=>'entity_id'),
'through'=>'supervises_relation','joinType'=>'INNER JOIN'),
'supervises_relation' => array(self::HAS_ONE, 'ParentChild', array('parent_id'=>'entity_id'),
'alias'=>'ssr'.$alias,'scopes'=>'supervises','joinType'=>'INNER JOIN'),
To find all the users supervised by another user I have this line of code:
$userModels=User::model()->supervisor_id(AppUtils::getRealUser()->entity_id)
->findAll(array('select'=>array(User::ENTITY_ID,User::DISPLAYNAME)));
$userData=CHtml::listData($userModels,User::ENTITY_ID,User::DISPLAYNAME);
In the above ‘getRealUser()’ provides the User instance of the currently logged user (as a sidenote, to clarify, there is also a getCurrentUser() to get the name of the user that the superuser is currently looking at).
The ‘select’ restriction is present because in this particular call I only want the ids and the names of the supervised users (to populate a dropdown).
‘$userDate’ provides the data for the dropdown.
‘supervisor_id’ is a 'virtual attribute scope automatically defined using my RelatedSearchBehavior extension with the following piece of configuration in ‘behaviors’:
$behaviors['relatedsearch']['relations']['supervisor_id']="supervisor.entity_id";
[size=“2”]Basically that says that ‘supervisor_id’ is the entity_id in the relation supervisor (which is defined further above).[/size]
[size="2"]The RelatedSearchBehavior extensions will setup the CDbCriteria which would look something like (but better):[/size]
[size="2"]
array(
'with'=>array(
'supervisor'=>array(
'condition'=>'supervisor.entity_id=:param',
'params'=>array(':param'=>AppUtils::getRealUser()->entity_id),
),
)
):
[/size]
‘together’ is usefull when you are doing a selection in a CGridView to get the count right.
This reminds me again of the power of my RelatedSearchBehavior extension. With the right setup, I just have to do:
[size=2]$userModels=User::model()->supervisor_id($super_id)[/size][size=2]->findAll();[/size][size=2]
[/size]
[size="2"]to get get the users having a selected supervisor. The resulting SQL query uses "three" tables (2xUser and 1xParentChild). You would have 1xUser, 1xGroup, 1xParentClhild.[/size]
You’ll also need to check up on RelatedSearchBehavior to fully “grasp” the above, but it is worthwhile to spend some time on it (you’ll save a lot more time later).
